lavd/fbdev_enc: add default device

Use device specified by environment variable FRAMEBUFFER or /dev/fb0 as default.

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/libavdevice/fbdev_enc.c b/libavdevice/fbdev_enc.c
index 098eedb5f5..8291b59759 100644
--- a/libavdevice/fbdev_enc.c
+++ b/libavdevice/fbdev_enc.c
@@ -45,17 +45,23 @@ static av_cold int fbdev_write_header(AVFormatContext *h)
     FBDevContext *fbdev = h->priv_data;
     enum AVPixelFormat pix_fmt;
     int ret, flags = O_RDWR;
+    const char* device;
 
     if (h->nb_streams != 1 || h->streams[0]->codec->codec_type != AVMEDIA_TYPE_VIDEO) {
         av_log(fbdev, AV_LOG_ERROR, "Only a single video stream is supported.\n");
         return AVERROR(EINVAL);
     }
 
-    if ((fbdev->fd = avpriv_open(h->filename, flags)) == -1) {
+    if (h->filename[0])
+        device = h->filename;
+    else
+        device = ff_fbdev_default_device();
+
+    if ((fbdev->fd = avpriv_open(device, flags)) == -1) {
         ret = AVERROR(errno);
         av_log(h, AV_LOG_ERROR,
                "Could not open framebuffer device '%s': %s\n",
-               h->filename, av_err2str(ret));
+               device, av_err2str(ret));
         return ret;
     }